My DD turns 4 months on Sunday and takes 30oz (give or take) a day. She has it usually over 4 or 5 bottles with the last bottle being larger or the last 2 being close together. For example 4 x 7 oz + 1 x 2oz or 3 x 7oz and 1 x 9 oz

Depends on the child really. At 8 weeks my ds1 as having 8oz every 2 hours, he was a little milk monster.

8oz at 5 months sounds fine to me. Is he still waking at night for a feed as well?

Wrt weaning, are you giving him puréed food? I'd say give him some in the morning after his morning bottle, then maybe again in the evening after his bottle again. Always milk first before solids as they need the milk more a this age.

And as you're weaning before 6 months avoid foods with gluten in them.

just wondering how many oz of formula milk is acceptable for a five month old. my son takes 8 oz every four hours and i have started him on solids twice a day now. never know how much food to give him really. think he would have more if i offered him more.